Has anyone designed or used spray drying equipment?
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Recently, while considering the recycling and recrystallization of sodium hydroxide, I learned about the one-effect, two-effect, and three-effect distillation methods used in the chlor-alkali industry in Changzhou to concentrate alkaline solutions. However, the concentration of the alkaline solution obtained in this way is only around 50%. If I want to recover a more concentrated alkaline solution, I think it would be appropriate to use spray drying equipment similar to those used in food processing. But I’m not sure whether pressure spraying or centrifugal spraying would be better. I hope someone on this forum who has experience with such equipment can give me some advice! Thank you!
There are various options for selecting a process, but it should not be decided subjectively. It is necessary to consider the costs associated with equipment installation, as well as the energy consumption during processing and the quality of the products...
It is outdated to think that one should solve all problems on one’s own and leave everything to the market; by isolating oneself from the outside world, it is inevitable to fall behind in the end. Have you heard the story of McDonald’s? When it was first established, McDonald’s focused solely on making hamburgers, while its competitors at that time thought more broadly and tried to produce everything themselves. As a result, while McDonald’s was becoming a global success, its competitors were still raising cattle on farms. Your posts follow a rather sophisticated approach and hold some value; it’s useful to extract useful technical insights from them or apply them to other areas as well. Teach the market the process from sodium hydroxide to sodium
It may not be very applicable; generally, spray drying systems are used to produce dry products or products with low water content
Is removing water also done when making milk powder and egg powder?
It can be used to obtain solid particles, but it is not suitable for recovering concentrated solutions
Spray drying is used to recover solid particles; therefore, if it is to be utilized, the final product should be sodium hydroxide powder. As for whether to use pressure spraying or centrifugal spraying, it will require actual experiments to determine; this method has not been tried before. In our laboratory, we have tested spray drying equipment using laundry detergent solution and milk, and pressure spraying was used in those tests.
Thank you for the advice! I’m thinking that pressure spray tends to clog the nozzles, so I think centrifugal spray is better.
In fact, pressure spraying is similar to centrifugal spraying. If you are concerned about clogging of the nozzles, you can circulate cooling water through the part of the nozzle that is inside the drying tower, so that the suspension does not overheat there; this should prevent the nozzles from clogging. I work with chemical laboratory equipment, and this is how we handle the equipment in our lab.
The key to using centrifugal spraying is that \"the powder being dried does not melt when it comes into contact with the tank wall, which allows the use of centrifugal spraying.\" Factors such as moisture content and density can all be addressed simply by controlling the time the spray stays in contact with the wall. As for whether to use centrifugal or pressure methods, centrifugal spraying generally results in particles of larger diameter that tend to stick to the walls. Hot air is usually supplied from the bottom in this case, while pressure spraying involves the use of high-pressure pumps to force the fluid forward, with hot air coming from the top. The appropriate method depends on various factors such as the properties of the material, its viscosity and density, as well as the volume to be processed